Figure 9.

Synthesis and characterization of NSHs based on solvent exchange‐intensified H‐bonding crosslinking. a) Fabrication of stiff and non‐swelling PVA exogel. b) Reversible sol‐gel transitions of PVA exogel achieved by altering solvent. c) Tensile stress‐strain curves, d) fracture energy, and e) comprehensive mechanical properties of PVA exogel and cryogel with varied PVA content. f) Optical images and g) SRs of PVA exogel and cryogel in water at determined time point. h) Tensile stress‐strain curves of PVA exogel before and after swelling for 7 days. Adapted with permission.^{[ 13c ]} Copyright 2020, Wiley‐VCH GmbH.